Für Miriam plot
Karen is a young math teacher who is involved in a traffic accident, which is not her fault. The accident causes the death of a girl on a scooter. Though innocent, the Karen is distraught. This is made worse when she discovers that the girl is Miriam, the sister of her student Lukas. The more everyone around her assures her that she is not responsible for Miriam's death, the more guilty Karen feels. To her, the accident is like a mathematical equation that just doesn't add up. In an effort to make up at least in part, she begins to give Lukas extra math lessons. But consumed by his pain, Lukas wants more from her.